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The key operative word is 'comparatively'. My thoughts are:
Latin America
Spanish acts as a lingua franca throughout most of Latin America and even to some extent among such immigrants and their descendants in the US. Knowledge of English is particularly low in Central America (bar Costa Rica and Panama) and the Andean countries, and even in the less touristy parts of Mexico it isn't that widespread either. Ditto Cuba, DR, Brazil and the Southern Cone. Even in Puerto Rico, a bilingual US colony since 1898, many still speak little or no English.
Northeast Asia
China is a big and powerful country, with Mandarin acting as a lingua franca. English would be reasonably widely-spoken in Beijing, Shanghai and Guangzhou, but not much elsewhere in the vast country. And while South Korea and Japan may in some ways be very Westernised, knowledge of English is poor and mostly confined to basic phrases and they usually write better than they speak, especially outside their respective capital cities. Meanwhile, North Korea is very isolated and in its own way so is Mongolia, so forget them.
Central Asia
Those countries are generally quite poor and isolated, and while independent since 1991 they still use Russian as a lingua franca even today, aside from their local languages.
Francophone Africa
French acts as the lingua franca in most of Central and West Africa bar Nigeria, Ghana and Gambia, as well as in most of North Africa. Still, even knowledge of French is far from universal in those countries, so why would knowledge of English be in double digits percentage-wise?
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